M 362K, Spring 03, Smith

## Assignment for Friday, October 31

*To Turn In*:

1. p. 176 #41

2. p. 177 #51 [Hint: What kind of random variable models this situation?
Why?]

3. p. 177 #58 (Show how you obtained your answers.)

4. Diskettes produced by a certain company will be defective with probability
0.01, independently of each other. The company sells the diskettes in packages
of size 10 and offers a money-back guarantee that at most 1 of the 10 diskettes
in a package will be defective.

a. What is the probability that a package will contain at least
one defective diskette?

b. If you buy three packages, what is the probability that exactly one of
the packages will contain at least one defective diskette?